ABSTRACT
In this discussion of rapidly solidified composite materials, both the so-called in :itu composites, and those composites which consist of a rapidly solidified matrix Jr reinforcement , which is then formed into a composite materia l using traditional Jrocesses, are excluded from consideration . For example, rapidly solidified Al-Livlg-Cu-Zr alloys may be aged to produce cored, or "composite," precipi tates [3]. 1-Vhile these precipitates, which consist of Al3Li around a Z r-rich core, may be :omposite precipitates , the material is not what is usually considered a composite n ateria l. Simi larly, rapidly solid ifi ed Ti-Al ribbon may be reinforced with carbon 1bers [4] by stacki ng alternating layers of the Ti-Al ribbons and the carbon fibers, 1nd subsequently pressing the stack in an evacuated fu rnace to cause the meta l to 'low superplast ically around the fibers . A lthough the matrix has been rapidly soidified , the composite has not. Thus, our examination is rest ricted to those materials Nith in troduced dissim ila r phases which are present at the time of rapid solid ifi-:ation. 'Present affiliatio n: Haverford College, Haverford . Pennsylvania .
